package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.constant.AutoFillConstant;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

@Aspect
@Component
@Slf4j
public class AutoFillAspect {
    /**
     * 切点
     */
    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    public void autoFillPointCut() {}

    /**
     * 前置通知 在通知中进行公共字段的赋值
     */
    @Before("autoFillPointCut()")
    public void AutoFill(JoinPoint joinPoint) {
        log.info("AutoFill");
        //获取当前被拦截的方法上的数据库操作类型
        MethodSignature signature = (MethodSignature) joinPoint.getSignature();//方法签名对象
        AutoFill autoFill=signature.getMethod().getAnnotation(AutoFill.class);//获得方法的注解对象
        OperationType operationType=autoFill.value();//数据库操作类型

        Object[] args = joinPoint.getArgs();
        if(args==null || args.length==0){
            return;
        }
        Object entity=args[0];

        LocalDateTime now=LocalDateTime.now();
        Long currentId= BaseContext.getCurrentId();


        if(operationType==OperationType.INSERT){


               try {
                  Method setCreateTime= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_TIME,LocalDateTime.class);
                  Method setCreateUser=  entity.getClass().getDeclaredMethod(AutoFillConstant.SET_CREATE_USER,Long.class);
                  Method setUpdateTime= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
                  Method setUpdateUser=  entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);

                  setCreateTime.invoke(entity,now);
                  setCreateUser.invoke(entity,currentId);
                  setUpdateTime.invoke(entity,now);
                  setUpdateUser.invoke(entity,currentId);
               }catch (Exception e) {
                   e.printStackTrace();
               }


        }else if(operationType==OperationType.UPDATE){
            try {
               Method setUpdateTime= entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_TIME,LocalDateTime.class);
               Method setUpdateUser=  entity.getClass().getDeclaredMethod(AutoFillConstant.SET_UPDATE_USER,Long.class);


                setUpdateTime.invoke(entity,now);
                setUpdateUser.invoke(entity,currentId);
            }catch (Exception e) {
                e.printStackTrace();
            }
        }

    }
}
